The concept that time represents the fourth dimension is widely accepted in the science and math community. Einstein theorized that the four dimensions were inextricably connected, introducing the concept of “spacetime,” which greatly expanded scientific and mathematical understanding of the universe.
The recent discovery of Gravitational Waves has served to solidify Einstein’s theories regarding a four-dimensional physical universe. However, the fourth dimension is a difficult idea to wrap one’s mind around because it is not something that is easily visualized. Time cannot be sped up or slowed down, or moved from place to place like an object on a three-dimensional plane. It may be simpler to think about the fact that an object must exist in a certain location (space) at a given time in order to be seen (observed) in the physical universe.